Fig. 6
From: Roles of extracellular polymeric substances in uranium immobilization by anaerobic sludge
The supposed roles of EPS in the U(VI) immobilization process by anaerobic sludge. Process I: U(VI) ions were adsorbed; Process II: U(VI) ions were reduced to U(IV) particles; Process III: U(VI) ions were precipitated to U(VI) particles; Process IV, V: if oxygen entered, U(IV) particles might dissolve to U(VI) ions and form U(VI) precipitates